Revert "Use MojoCompositorFrameSink in RendererCompositorFrameSink"

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index 8ca048bea8209844613c3d06e552c9494df43d50..64ea5a5bc844e6ec88e91a4f6644b28ead29fb21 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -32,7 +32,6 @@
 #include "content/common/content_export.h"
 #include "content/common/frame.mojom.h"
 #include "content/common/frame_replication_state.h"
-#include "content/common/frame_sink_provider.mojom.h"
 #include "content/common/render_frame_message_filter.mojom.h"
 #include "content/common/render_message_filter.mojom.h"
 #include "content/common/renderer.mojom.h"
@@ -503,10 +502,6 @@ class CONTENT_EXPORT RenderThreadImpl
     return needs_to_record_first_active_paint_;
   }
 
-  mojom::FrameSinkProvider* GetFrameSinkProvider() {
-    return frame_sink_provider_.get();
-  }
-
  protected:
   RenderThreadImpl(
       const InProcessChildThreadParams& params,
@@ -788,8 +783,6 @@ class CONTENT_EXPORT RenderThreadImpl
 
   variations::ChildProcessFieldTrialSyncer field_trial_syncer_;
 
-  mojom::FrameSinkProviderPtr frame_sink_provider_;
-
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };